JPH08246702A - Collapse prevention device in building - Google Patents

Abstract

PURPOSE: To prevent the deformation and collapse of a building by forming a diagonal bracing between opposing support columns automatically when sway and vibration exceeding a predetermined value act on the building due to earthquake. CONSTITUTION: A collapse prevention device in a building consists of a vibration detection member 7 consisting of a sensor which operates when sway and vibration exceeding a predetermined value are generated in the building and brace members 2a, 2b consisting of rope bodies which are strained diagonally between opposing support columns 13a and 13b due to the action of the vibration detection member 7 to form a diagonal bracing. In the normal condition when there is no sway and vibration, the brace members 2a, 2b keep a section between the opposing support columns 13a and 13b (an opening B) in the open condition. Only when sway and vibration exceeding a predetermined value are generated, the brace members 2a, 2b are wound up against weight members 11a, 11b by the operation of a winch 6, etc., to form a diagonal bracing between the opposing support columns 13a and 13b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure between pillars facing each other when strong shaking or vibration is applied to a structure due to a natural disaster such as an earthquake or a strong wind, or a trigger caused by an explosion of gas or gunpowder. The present invention relates to a collapse prevention device for a building, which can prevent deformation or collapse of the structure by immediately forming a brace.

[0002]

2. Description of the Related Art In structures such as wooden structures and steel frame structures,
In order to prevent the frame from being deformed into a rhombus due to horizontal load due to earthquake or wind, and to prevent the deformation from rising and the building to collapse,
It is a common knowledge of building technology to fix a strength brace between a pillar of a building and a pillar to improve strength. Due to the appearance of the building, this brace is hidden by walls and panel materials so that it cannot be seen from inside and outside the building. However, among these buildings, the first floor part that comes into contact with the ground is often used for stores, warehouses, or garages. Therefore, a large opening or an internal space is required. In many cases, the structure cannot be provided and the structure is supported substantially only by the columns.

[0003]

A building in which the first-floor portion in contact with the ground is supported only by columns without brace is not so strong in strength. Therefore, shaking and vibration exceeding the predetermined limit specified at the time of designing. If it acts on the building, the pillars may be deformed or broken, resulting in irreparable physical damage to the building, so some reinforcement is required. However, at present, there is no effective reinforcement method in relation to the purpose of use.

In view of such a current situation, the present invention detects the shaking or vibration when a strong vibration or vibration is applied to a building due to an earthquake or wind, and immediately detects the shaking or vibration between the supporting pillars facing each other. It is intended to provide a collapse prevention device for a structure that can reinforce a building by forming a braid by a cord body.

[0005]

In order to achieve such an object, a collapse prevention device for a building according to the present invention is a vibration sensing device that senses and operates when a building shakes or vibrates more than a predetermined amount. A member and a breath member composed of a cord body that is diagonally tensioned to form a bracing between the opposing columns by the operation of the vibration sensing member, and there is no shaking or vibration above a predetermined level in the building. In the normal state, the brace member is configured to hold the opposing struts in an open state and form braces between the opposing struts only when shaking or vibration of a predetermined amount or more occurs. .

[0006] One of the concrete examples of the collapse prevention device for a building of the present invention is a vibration sensing member that senses and operates when a building shakes or vibrates more than a predetermined amount, and an operation of the vibration sensing member. A brace member composed of a cord body that diagonally tensions between opposing struts to form a brace, and along a beam or ceiling connecting the brace members between the struts in a state where the brace member does not form a brace. In the normal state where the building does not shake or vibrate more than a predetermined amount, the brace member holds the opposing columns in an open state by the setting member and shakes more than a predetermined amount. Only when vibration or vibration occurs, the breathing member is wound up by the winch against the biasing force of the setting member to form braces between the opposing columns. It is characterized in that the form.

Another embodiment of the collapse prevention device for a building according to the present invention is that at least one of the supporting columns of the building has a slit formed by forming a cylindrical auxiliary column along the longitudinal direction of the other column. The brace member is attached so as to face the facing surface of the support column, and the base end of the breath member made of a cord is attached to the weight member vertically movable on the auxiliary support column. And lift it upwards and pull it out from the slit at the upper end, and along the beam or ceiling that connects the columns via an engaging member that interlocks with the vibration sensing member that is rotatably provided at the upper end of the auxiliary column. In the normal state where the building is fixed to the upper end of the other column and there is no shaking or vibration above a predetermined level, the breathing member holds the brace member in an open state between the opposing columns by the weight member, and shakes or vibrates above a predetermined level. When occurs Operating the saw the engaging member weight member is lowered to the auxiliary strut and is characterized by being configured to form a brace between opposing struts.

Still another specific example of the collapse prevention device for a building of the present invention is that the base end of a brace member made of a strip-shaped cord is provided at the lower end of at least one of the supporting columns of the building. Fixing, the brace member is lifted upward along the column, the tip end is fixed to the hoisting holding mechanism provided on the other end of the column via the vibration sensing member provided on the upper end of the column, It is characterized in that the vibration sensing member is activated to wind up the breath member only when the building shakes or vibrates more than a predetermined amount to form a bracing between the opposing columns.

In the present invention, the brace member formed of a cord body for constructing a brace between the columns facing each other in the building basically forms a brace only in one direction although it depends on the designed strength of the building. However, in order to further increase the strength, it is preferable to form a pair so that cross braces are formed between the columns.

The brace member for forming the braces between the stanchions is a cord, such as a wire or rope, having a strength capable of withstanding a predetermined vibration value. It is also possible to use braided cord-shaped cords.

Further, the vibration sensing member for actuating the breathing member by sensing a shaking or vibration of a building more than a predetermined value and its transmitting means do not disturb the opening of the building by sensing the shaking or the vibration generated. As long as the brace member stretched like this can be tensioned between the opposing columns to form a brace, the structure is not particularly limited. The brace member may be formed in a brace by operating a winch that is interlocked with, or the brace member may be formed in a brace without using a motor by mechanically detecting shaking or vibration.

[0012]

The collapse prevention device for a building according to the present invention, in a normal state where the building does not shake or vibrate more than a predetermined amount, holds a brace member that constitutes a brace along a pillar or a beam of the building. The open state is maintained so that there is no hindrance to the loading and unloading of goods and equipment and the entry and exit of people through the openings formed between the columns, and it is equipped when the building shakes or vibrates more than a predetermined amount. The vibration sensing member operates to tension the brace members diagonally between the opposing columns to form braces, prevent deformation and breakage due to shaking or vibration applied to the columns, and prevent the building from being damaged or collapsed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a collapse prevention device for a building according to the present invention will be specifically described below with reference to the accompanying drawings.
1 to 3 show an embodiment of a collapse prevention device for a building according to the present invention, and the collapse prevention device 1 shown in FIG.
As shown in (1), it is provided in an opening B of a wide frontage formed by a pair of adjacent columns 13a and 13b on the first floor which are in contact with the ground of the building A and a beam 14 which connects them.

As shown in FIG. 1, the collapse prevention device 1 includes a pair of brace members 2a and 2b, which are basically made of wires having a predetermined strength, and a pair of brace members 2a and 2b facing each other between columns 13a and 13b. A winch 6 having a pair of winding drums for diagonally tensioning and forming a bracing, a vibration sensing member 7 including a sensor for operating the winch 6, and the breath members 2a, 2b were always loosened. Columns 13a and 13b that are adjacent to each other while being held in a state
It is constituted by a pair of setting members 8a and 8b which keep the opening B along the path so as not to hinder the entrance and exit.

The winch 6 is interlocked with a motor (not shown) capable of normal and reverse rotation, and the pair of breath members 2a and 2b are commonly wound by forward rotation of the motor, and the breath members 2a and 2b are wound by reverse rotation. It is commonly rewound and loosened, and is provided in the beam 14 which connects between the supporting columns 13a and 13b, which is interlocked with the motor started by the operation of the vibration sensing member 7, or in the substantially central portion of the ceiling.

The brace member 2a (2b) is a reinforcing member 14 that reinforces the base of one of the columns 13a (13b) of the building.
The base end portion of the breath member 2a (2b) is fixed to the fixing portion 3a (3b) provided on the a (14b), and the support 13
Lift up along a (13b),
3a (13b) from the upper end of the supporting column 13b (13
The tip of the winch 6 is wound from the lower side of one drum to the clockwise direction (the clockwise direction from the upper side of the other drum) via a roller 5a (5b) fixed to the upper end of a). It is a thing.

The setting member 8a (8b) is composed of a relatively thin wire rope, and the base end of the setting member 8a (8b) is the pillar 1.
The breath member 2a (2a located at the upper end of the 3a (13b)
b) fixed to 4a (4b), and at the same time, the pillar 13a
Fixed to the other end side of the upper end of the column 13a (13b) via the roller 9a (9b) provided at the upper end of (13b) 12a
(12b), the setting member 8a (8) between the roller 9a (9b) and the fixed 12a (12b) portion.
A pulley 10a (1) having a weight 11a (11b) is provided in b).
0b) is provided.

When the breathing member 2a (2b) is loosened by the winch 6, the setting member 8a (8b) has a pulley 10a (10b) as shown in FIG.
The weight 11a (11b) provided in b) is lowered and the support 13
Breath member 2a (2b) located below a (13b)
The fixing member 4a (4b) is pulled toward the roller 9a (9b) side to move the breath member 2a (2b) to the support column 13a (13b).
The opening B is held along the beam 14 and the beam 14 in an open state. When the winch 6 is actuated by shaking or vibration and the breath member 2a (2b) is rolled up, the breath member 2a (2b) resists the weight of the weight 11a (11b) by the pulling force of the winch 6, as shown in FIG. Pulled by
The brace member 2a (2b) is tensioned diagonally between the columns 13a and 13b to form a brace.

When the vibration sensing member 7 composed of a sensor senses a vibration exceeding a preset vibration value, the contact of the switch is closed and the motor of the winch 6 is automatically activated to move the winch 6 in the direction of the arrow. While rotating
It has a function of issuing an alarm.

The collapse prevention device 1 for a building having such a structure is
The brace can be automatically formed between the opposing columns by the operation described below. In a normal state in which the building is not shaken or vibrated by an earthquake or a strong wind, the vibration sensing member 7 and the winch 6 do not operate as shown in FIG.
The open state is maintained so that there is no hindrance to entry and exit between a and 13b. That is, since the pair of brace members 2a and 2b are not wound around the drum of the winch 6, the weight members 11a and 11b that form the setting members 8a and 8b.
Since the brace members 2a and 2b are pulled toward the columns 13a and 13b, respectively, the brace members 2a and 2b are in a state where they do not interfere with the opening and closing of the opening B.

In such a state, when an earthquake or a strong wind causes vibration or vibration in the building that exceeds the amount set in the vibration sensing member 7, the vibration sensing member 7 senses the vibration and at the same time the motor of the winch 6 is activated. The winch 6 is rotated in the direction of the arrow. Due to the rotation of the motor, the breath members 2a and 2b are moved to the weight members 11a and 11a as shown in FIG.
Each breath member 2a, 2b is wound up on the drum of the winch 6 against the load of 11b, so that each breath member 2a, 2b has a roller 5a, which is provided at the upper end of the supporting column 13a, 13b.
5B and the fixed portions 3a and 3b at the lower end are tensioned in a diagonal line to automatically form an X-shaped brace between the columns 13a and 13b. Therefore, the formed braces can suppress the shaking and vibration of the columns 13a and 13b, particularly the horizontal shaking and vibration, and reliably prevent the building from being damaged or collapsed.

When the vibration of the building is stopped, the motor is rotated in the reverse direction to loosen the breathing members 2a and 2b wound up by the winch 6 so that the breathing members 2a and 2b are weighted.
By the action of a and 11b, the columns 9a and 9b provided at the upper ends of the columns 13a and 13b are used as fulcrums to support the column 13
It is pulled back to the a, 13b side and returns to the original state, and the opening B
You can freely move items and equipment in and out, and people can move in and out freely.

The collapse prevention device 1 for this building is applied between the pillars of the first floor of a building, such as a building, a large store, a warehouse, or a garage, which is difficult to reinforce by bracing because it requires a large frontage. By this means, a particularly excellent function is exhibited, but it is needless to say that the present invention can be applied even if it is not necessarily the first floor portion. The brace formed between the columns may be a square brace or both braces, and the number of the brace members may be selected according to the required strength.

In this embodiment, the column 13
Since the brace members 2a and 2b are used to form the braces between the a and 13b by using the winch 6 which is interlocked with the motor,
Since it is possible to deal with a case where a power failure occurs at the same time as the occurrence of an earthquake, in this case, it is desirable to provide a device having a function of an uninterruptible power supply and switch to this simultaneously with a power failure.

FIGS. 4 and 5 show another embodiment of the collapse prevention device for a building according to the present invention. In the illustrated example, one braces are formed between columns, but a pair of brace members are used. By doing so, it is possible to form both X-shaped braces. The collapse prevention device 21 is installed in an opening C of a building formed by a column 32a having a relatively narrow frontage, a column 32b and a beam 33, and its basic configuration is an auxiliary member connected to the inside of the column 32a. Pillar 25,
A weight member 27 which is inserted into the auxiliary column 25 and moves up and down.
And a vibration sensing member 30 for automatically tensioning the brace member 22 by sensing vibration to automatically form a brace between the columns 32a and 32b.

As shown in FIG. 5, the auxiliary strut 25 provided on the facing surface (inside) of the strut 32a facing the strut 32b has an appropriate length along the longitudinal direction at the center of one side surface of a tubular steel material having a rectangular cross section. A slit 26 having a width is formed, and the auxiliary column 25 has a length that is slightly shorter than the length of the first floor portion of the column 32a to be attached, and faces the side surface where the slit 26 is formed. Back 32a
It is fixed to the inner side of the column by welding or bolting, and the slit 26 faces the inner side of the strut 32b facing the slit.

The weight member 27, which is vertically movably inserted in the auxiliary support column 25, is made of H-shaped steel having a length of 1/2 or less of the auxiliary support column 25 and an appropriate weight. Is inserted into the auxiliary column 25 such that the center side connecting the lines is parallel to the slit 26 formed in the auxiliary column 25.

The brace member 22 is made of a wire rope having an appropriate diameter, and its tip portion is an annular fixing portion 23 provided at the upper end of the support column 32b facing the support column 32a.
The base end portion is fixed to the fixing portion 24 at the lower end of the central side connecting both H-shaped wing sides of the weight member 27 through the slit 26 provided in the auxiliary column 25.

At the upper end of the surface of the auxiliary column 25 facing the column 32b, at least the horizontal end of the auxiliary column 25 is rotated vertically from the horizontal direction, and the slit 26 formed in the auxiliary column 25 at the normal horizontal position. A hook member 28 is provided so that the tip end thereof slightly protrudes from the corner of the auxiliary support column 25 across the corner.

On the other hand, a spherical weight 29 having a predetermined weight is provided at the tip of the shaft member on the upper outer wall of the auxiliary column 25 from which the tip of the hooking member 28 projects, and at the base end thereof. A vibration sensing member 30 having a hook portion 31 that engages with the tip projection of the hooking member 28 is swingably attached within an appropriate range.

The collapse prevention device 21 having such a structure can automatically form a brace between the columns 32a and 32b by the operation described below. That is, the weight member 27 having the base end portion of the breath member 22 fixed to the lower end portion is pulled up to the upper portion of the auxiliary column 25, and the hooking member 28 provided on the auxiliary column 25 is passed under the breath member 22. The tip portion is held horizontally by the hook portion 31 of the vibration sensing member 30. In this state, the brace member 22 reaches the lower end of the weight member 27 in a bent shape along the beam 33 by the latching member 28 locked by the vibration sensing member 30 and through the upper side of the latching member 28. The weight member 27 is
It is held in the upper part of the auxiliary column 25, and in a normal state where the building is not shaken or vibrated by an earthquake or a strong wind, the state is maintained as it is, and the building opening C is kept open.

However, when the building shakes or vibrates more than a predetermined amount due to an earthquake or a strong wind, the weight member 29 above the vibration sensing member 30 rocks, and this rocking causes the tip portion of the latch member 28 to move. Since the engagement with the hook portion 31 is released, the locking member 28 is rotated downward by the action of the breath member 22 and the weight member 27.

By rotating the latch member 28 downward, the weight member 2 fixing the base end portion of the breath member 22.
7 is an auxiliary column 25 as shown by the alternate long and short dash line in FIG.
Since the inside of the brace member 22 falls downward,
Through the slit 26 of 5, the tension between the columns 32a and 32b is obliquely provided, and the brace member 22 can form a brace in the building opening C. Therefore, the formed braces can suppress the shaking and vibration of the columns 32a and 32b, particularly the shaking and vibration in the horizontal direction, and reliably prevent the building from being damaged or collapsed.

When the vibration of the building is stopped, the weight member 27 is pulled up to the upper part of the auxiliary column 25, and the hook member 28 is passed under the breath member 22 in the same manner as described above to make the vibration sensing member 3
By holding the hook portion 31 of 0 horizontally, the original state can be easily restored. Although not shown, a rope for pulling up is attached to the upper end of the weight member 27, the tip of the rope is hung from the upper part of the auxiliary column 25 to the outside, and the rope is pulled to pull up the weight member 27. This makes it easier to return to the original state.

The collapse prevention device 21 in this embodiment is
By appropriately adjusting the shape of the hook portion that engages with the weight member 29 of the vibration sensing member 30 and the tip end portion of the hooking member 28, it is possible to deal with the degree of vibration that has occurred. In particular, the collapse prevention device 21 of this embodiment is
Brace can be automatically formed by pure mechanical structure without using any power such as motor.
It is economical because it has a simple structure and requires less equipment.

The collapse prevention device 41 in the building of the present invention shown in FIGS. 6 to 8 is for forming a one-sided cross in the opening D of the building formed by the support column 52a, the support column 52b and the beam 53. is there. The basic structure is that the brace member 42, a hoisting and holding mechanism 45 that winds and rewinds the brace member 42 provided at the upper end of one of the opposing columns 52a, and the brace member 42 on the other column 52.
It is composed of a locking member 44 provided on the upper part of the support column 52b so as to be pulled to the upper part of b, and a vibration sensing member 50 which holds the locking member 44 detachably.

The brace member 42 is made of a belt-shaped body having a predetermined width and having a predetermined toughness obtained by weaving synthetic fibers or metal filaments.

As shown in FIGS. 7 and 8, the hoisting and holding mechanism 45 includes a drum 47 for winding the breathing member 42 around a shaft member 46, a coil spring 48 for winding up the breathing member 42 around the drum 47, and a coil spring 48 for winding the breathing member 42 around the drum 47. Breath member 42 rolled up
A brake 49 for preventing the rewinding of the brake plate is coaxially provided. The brake 49 is provided on the sawtooth claws of the brake plates 49a and 49b by the biasing of a pair of left and right sawtooth brake plates 49a and 49b and a spring 49c. Lever 4 to engage
9d and has a releasing function that can release the blocking of the rewinding by pulling the string 49e provided on the lever 49d.

The tip portion of the breath member 42 is attached to the drum 47 of the hoisting and holding mechanism 45, and the base end portion is fixed to the lower portion of the other column 52b.

The column 5 to which the hoist holding mechanism 45 is attached
The engaging member 50a provided on the upper portion of the support column 52b facing the 2a maintains a horizontal state in the normal state and rotates downward from the horizontal state only when a load acts, and the hook 50b is formed at the tip portion. At the same time, a weight member 50c is integrally attached to the rear end of the vibration sensing member 50 via a cord.

The hook portion 50b of the engaging member 50a is engaged with the tip end portion of a breath tension member 44 for pulling it toward the brace member 42 column 52b. The breath tension member 44 is provided at an upper end portion of a surface facing the support column 52a, and a base end portion of the breath tension member 44 is rotatably attached to the support column 52b.
The brace member 42 is pulled inside the support column 52b along the beam or ceiling by hooking.

The weight member 50c constituting the vibration sensing member 50 is always placed on the placing plate 51 provided on the support column 52b, and the weight member 50c falls from the placing plate 51 to make a breath tension member. By pulling the base end portion of the engaging member 50a engaging the 44 downward, the engagement with the breath tension member 44 is released as shown by the dotted line in the figure, and the breath tension member 44 is released.
Rotates from the horizontal direction to the vertical direction downward to cause the breath member 42 to loosen.

The collapse prevention device 41 having the above structure is
When a building receives more than a predetermined amount of vibration due to an earthquake,
When the weight member 50c placed on the placing plate 51 falls, the engaging member 50a rotates, the engagement with the breath tension member 44 is released, and the breath member 42 is loosened. The brace member 42 is rapidly wound up by the urging force of the spring 48 of the upper holding mechanism 45, and the brace member 42 is tensioned diagonally between the columns 52a and 52b as shown by the dotted line in the figure to automatically form braces. It is a thing.

At this time, if a rewinding pulling force is generated in the breath member 42 due to the subsequent vibration, the lever 49d of the brake 49 engages with the serrated claws of the brake plate 49a to prevent the rewinding, and vibrates. If stops, lever 4
After pulling the string 49e provided on 9d to release the blocking of the rewinding so that the rewinding can be freely performed, the weight member 50c is returned to the mounting plate 51 and the vibration sensing member 50 is engaged. By locking the member 50a to the breath tension member 44, the opening D can be in a state without brace.

Breath member 4 used in this embodiment
In No. 2, since a tough band can be used and the structure is simple, it can be attached to each room of the building and effectively used without being unclean. A radio with a light is used as a weight in place of the weight member 50c, and vibration of a predetermined amount or more generated by an earthquake or the like is detected to automatically turn on the radio with the light and start radio broadcasting. By doing so, it is possible to accurately grasp the surrounding situation at night and the occurrence situation of the disaster.

[0046]

According to the collapse prevention device for a building of the present invention, in a normal state where the building is not shaken or vibrated more than a predetermined amount, a brace member forming a bracing between opposing columns is used for entering and leaving the opening of the building. When the building is kept in a non-obstructed state and the building shakes or vibrates more than a predetermined amount, a vibration sensing member is used to tension the breath member diagonally between the opposing columns to automatically form braces. Therefore, the building is prevented from being damaged due to deformation or breakage of the pillar due to shaking or vibration applied to the pillar.

[Brief description of drawings]

FIG. 1 is a front view showing a mounted state of an embodiment of a collapse prevention device for a building according to the present invention.

FIG. 2 is a front view of the collapse prevention device in FIG. 1 in use.

FIG. 3 is a perspective view showing an example of a building to which the collapse prevention device of FIG. 1 is applied.

FIG. 4 is a front view showing another embodiment of the collapse prevention device for a building according to the present invention.

5 is a partially cutaway perspective view showing a main part of the collapse prevention device of FIG.

FIG. 6 is a front view showing still another embodiment of the collapse prevention device for a building according to the present invention.

7 is an explanatory view of a hoisting and holding mechanism in the collapse prevention device of FIG.

8 is an explanatory diagram showing a brake in the hoisting and holding mechanism of FIG. 7. FIG.

[Explanation of symbols]

 1 Collapse prevention device in a building 2a, 2b Breath member 3a, 3b Fixed part 4a, 4b Fixed (part) 5a, 5b Roller 6 Winch 7 Vibration sensing member 8a, 8b Setting member 9a, 9b Roller 11a, 11b Weight member 13a , 13b prop 14 beams

Claims (10)

[Claims] 1. A vibration-sensing member that senses and operates when a building shakes or vibrates more than a predetermined amount, and a diagonally-tensioned bracing is formed between the columns that face each other by the operation of the vibration-sensing member. In a normal state where the building does not shake or vibrate more than a predetermined amount, the brace member keeps the space between the opposing struts in an open state, and shakes or vibrates more than a predetermined amount. A collapse prevention device for a building, characterized in that a brace is formed between the columns that face each other only when an occurrence occurs. 2. The collapse prevention device for a building according to claim 1, wherein the brace members are paired so that braces intersect each other between opposing columns. 3. A vibration sensing member that senses and operates when a building shakes or vibrates more than a predetermined amount, and a diagonally-tensioned bracing is formed between the supporting columns that are opposed by the operation of the vibration sensing member. A brace member made of a cord and a setting member for holding the blaz member along the beam or ceiling connecting the columns in a state where the brace member does not form a brace, In a normal state where there is no shaking or vibration above a predetermined level, the brace member holds the opposing columns in an open state by the setting member and resists the biasing force of the setting member only when shaking or vibration above a predetermined level occurs. Then, the brace member is wound up by a winch to form a bracing between the columns facing each other. 4. The brace member is fixed to the lower end of one of the supporting columns whose base ends are opposed to each other, and is stretched upward along the supporting column, and the tip end of the breathing member is the upper end of the other supporting column. The brace member fixed to a winch provided in the center of the beam or ceiling that connects the columns via a roller provided in the column is an upper part of the column. In the normal state where the building is connected to one end of the cord member that constitutes the setting member, and the building is not shaken or vibrated more than a predetermined amount, the weight provided on the setting member causes the brace member to open between the opposing columns. The brace member is rolled up by the winch against the urging force of the weight to form a bracing between the opposing columns only when the sway or vibration exceeds a predetermined level. The collapse prevention device for a building according to claim 3, wherein: 5. A cylindrical auxiliary strut is attached to at least one of the opposite pillars of the building so that a slit formed along the longitudinal direction faces a facing surface of the other pillar, and is vertically moved to the auxiliary pillar. Attach the base end of a breath member made of a cord to a freely provided weight member, lift the tip end of the breath member upward along the inside of the auxiliary column, and pull it out from the slit at the upper end. A sway of a predetermined amount or more in the building after being fixed to the upper end of the other pillar after being aligned with the beam or ceiling that connects the pillars via an engagement member that interlocks with a vibration sensing member In a normal state where there is no vibration or vibration, the breathing member holds the brace member in an open state between the opposing columns by the weight member, and the engagement member operates only when shaking or vibration of a predetermined amount or more occurs, and the weight member Goes down in the auxiliary column, A collapse prevention device for a building, characterized in that it is configured to form a brace between opposing columns. 6. The engagement member is, in a normal state, orthogonal to a slit formed in the auxiliary column, and a tip end thereof is engaged with a vibration sensing member rotatably provided at an upper end of the auxiliary column. In a horizontal state, the vibration sensing member is activated only when the building shakes or vibrates more than a predetermined amount to disengage the engagement member, and the engagement member rotates downward. The collapse prevention device for a building according to claim 5. 7. A base end of a brace member made of a strip-shaped cord is fixed to a lower end of at least one of the supporting columns of a building, and the brace member is lifted upward along the column, The vibration sensing member is fixed to the hoisting and holding mechanism provided on the other end of the column via the vibration sensing member provided on the upper end of the column, and the vibration sensing member is provided only when the building shakes or vibrates more than a predetermined amount. Is actuated to wind up the brace member to form braces between opposing columns, the collapse preventing device for a building. 8. The winding-up holding mechanism comprises a drum for fixing a tip end portion of a breathing member made of a strip-shaped cord, a spring for constantly urging the drum in a winding direction, and a wound breathing member. The collapse prevention device for a building according to claim 7, further comprising a brake with a release function that prevents rewinding and releases the blocked rewind. 9. The vibration sensing member includes an engaging member rotatably attached to an upper end of a support, a hook portion and a distal end of the engaging member engaged with each other, and a proximal end of the engaging member. A breath tension member rotatably provided with respect to the column, and a weight member provided at the rear end of the engaging member,
In the normal state, the tip end of the engaging member engages with the breath tension member, and only when the building shakes or vibrates more than a predetermined amount, the weight member descends downward to engage the engagement member and the breath tension member. 9. The collapse prevention device for a building according to claim 7, wherein the brace member is configured to be loosened by the downward movement of the brace tension member when the engagement is released. 10. The vibration sensing member may be a radio with a light, or a radio with a light may be attached to the vibration sensing member to detect a vibration of a predetermined level or more, and to detect the vibration with a light. The collapse prevention device for a building according to any one of claims 7 to 9, wherein the device is configured to perform lighting and broadcasting.